CAN YOU HIDE A SCAR OR TEMPORARY BLEMISH?

Yes, Photoshop works very well for that. Lighting can also accentuate or de-emphasize features to some degree. Some features people absolutely want to keep: freckles, moles, battle scars, birthmark, and tattoos. We can talk about what to fix and what to leave alone. Also works to reduce lines, wrinkles, shadows, slenderize, and more.